How do I purchase InvoiceThis off the AppExchange?

Step 1 – Login to the Salesforce AppExchange through the following link: AppExchange

Step 2 – Select your User icon at the top right of the browser and then select ‘My Account

Step 3 – Find the InvoiceThis Xero Engine app on the list and select ‘Buy Now

Step 4 – The Salesforce AppExchange will now take you through the secure payment details process, after which you can manage the subscription from within the AppExchange